- (of an object, especially a round one such as a ball) move quickly up, back, or away from a surface after hitting it（尤指球状物体）弹起, 反弹：
the ball bounced away and he chased it
球弹开了, 他去追
with obj. he was bouncing the ball against the wall.他正对着墙打球。
- (of light, sound, or an electronic signal) come into contact with an object or surface and be reflected back（光, 声音或电子信号接触物体后）反弹, 反射：
short sound waves bounce off even small objects.
短声波即使遇到很小的物体也会被反射开去。
- （亦作bounce back）(of an email) be returned to its sender after failing to reach its destination（电子邮件因未送达目的地而）被退回：
I tried to email him, but the message bounced.
我试着给他发了电子邮件, 可是被退回来了。
bounce back
figurative recover well after a setback or problem〈喻〉（遇到挫折或难题后）迅速恢复：the savings rate has already started to bounce back and is sure to rise further.
储蓄率已开始回升, 而且肯定会继续上涨。
- (of a springy object) move up and down while remaining essentially in the same position（弹性物体在原地）弹跳：
the gangplank bounced under his confident step.
跳板在他自信的脚步下来回弹动。
- (of a person) jump repeatedly up and down, typically on something springy（人）不断地跳动（尤指在某种有弹性的物体上跳动）：
Emma was happily bouncing up and down on the mattress.
爱玛高兴地在床垫上蹦蹦跳跳。
- with obj. cause (a child) to move lightly up and down on one's knee as a game（作为游戏）让（小孩在膝盖上）跳动。
- with adverbial of direction move in a particular direction in an energetic, happy, or enthusiastic manner跳跃着前进：
Linda bounced in through the open front door.
琳达兴高采烈地从敞开着的前门跑了进来。
- with adverbial of direction(of a vehicle) move jerkily along a bumpy surface（交通工具）颠簸前行：
the car bounced down the narrow track.
汽车在狭道上颠簸前进。
- informal (of a cheque) be returned by a bank when there are insufficient funds in an account to meet it〈非正式〉（支票）遭到银行拒付而被退回：
a further two cheques of £160 also bounced.
后开出的两张160英镑的支票也遭到了拒付被退回了。
- with obj.(of a bank) return a cheque in such circumstances（银行）拒付空头支票。
- with obj. informal, chiefly N. Amer. dismiss (someone) from a job〈非正式, 主北美〉解雇, 开除：
those who put in a dismal performance will be bounced from the tour.
那些表演不佳的人将不让参加巡回演出。
- with obj. informal eject (a troublemaker) forcibly from a nightclub or similar establishment〈非正式〉撵走, 逐出（捣蛋者）。
- with obj. Brit. informal pressurize (someone) into doing something, typically by presenting them with a fait accompli〈英, 非正式〉威吓（某人）做：
the government should beware being bounced into any ill-considered foreign gamble.
政府应谨防在受到受威吓时不经考虑就参加任何外交冒险活动。
- with obj. W. Indian come into sudden forceful contact with (some one or something); collide with〈西印度〉撞击, 碰撞：
people cross the road as slowly as possible, as if daring the cars to bounce them.
人们尽量放慢了过马路的速度, 好像想试试看车敢不敢来撞他们。
- a rebound of a ball or other object（球或其他物体的）弹回, 跳回：
the wicket was causing the occasional erratic bounce.
这一轮击球中出现了偶尔飘忽不定的反弹球。
- an act of jumping or an instance of being moved up and down lightly or jerkily颠跳：
every bounce of the truck brought them into fresh contact.
卡车的每一下颠簸都使他们碰到对方的身体。
- mass noun the ability of a surface to make a ball rebound in a specified way弹力, 弹性：
a pitch of low bounce.
弹性低的球场。
- a sudden rise in the level of something（突然的）上升, 上扬：
economists agree that there could be a bounce in prices next year.
经济学家一致认为明年的价格会上扬。
- mass noun exuberant self-confidence十足的自信：
the bounce was now back in Jenny's step.
詹尼的步伐中又充满了自信。
- mass noun health and body in a person's hair（头发的）柔韧性, 弹性：
use conditioner to help hair regain its bounce.
使用护发剂来帮助头发恢复韧性。
- W. Indian a collision〈西印度〉碰撞。
be bouncing off the walls
- N. Amer. informal be full of nervous excitement or agitation〈北美, 非正式〉激动不安的。
bounce an idea off someone
- informal share an idea with another person in order to get feedback on it and refine it〈非正式〉向某人贩卖自己的看法。
on the bounce
- as something rebounds在弹起时：
he caught the ball on the bounce.
他在球弹起时抓住了它。
- informal in quick succession〈非正式〉接二连三地：
it's nice to get four victories on the bounce.
连胜四次的感觉真好。